Bears Eating Moths In Wyoming's High Country - Joe Riis

Last summer, National Geographic photographer Joe Riis got wild and lived outside in the Wyoming wilderness for 8 months. The photographer who prefers to sleep on the ground, studied the migrations of all of the wild animals that lived around him. Riis specializes in photographing migrations and how they interact with each other, and with humans. He tells about how bears and moths have a migration collision. The grizzlies feed on moths during the late summer as they fatten up for winter. Riis explained that the greatest threats to pronghorn and other animals that migrate throughout the year are housing developments, roads, fences and energy projects.